I need advice: My sons best friend is 6 years old, he told me he has crushes on boys. How can I encourage him, yet guide him a bit to keep him safe from bullying?

My sons bestie told me he likes boys and wants to kiss them and have them be his boyfriend. I don't live in a progressive area.He'll say something Ike "I want so-and-so to be my boyfriend," and I've been saying stuff like jokingly saying "you're a little young to date, I was 15 when I had my first boyfriend, why don't you just ask him to be your friend for now?"He wants to do his fingernails, so I do it with clear polish and then buff and file them. I told him that's the way my dad gets then done and that it looks cool because it catches the light.He likes being the girl when my son and him play house; I tell them it's like dressing up when you do a play, and that it's like in Peter pan when a girl usually plays a boy.Sometimes my son asks me why his friend likes boys, and I told him "daddy and me are a boy and a girl who like each other, but sometimes boys like boys and girls like girls." I hope my demeanor and tone make him think it's not odd.I don't want to change who he is because I'm not his mom, but I want to keep him safe, yet help him do what he wants without making him feel like his questions and wants are wrong.Are my actions homophobic?